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- Indice
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CRS-300 1:10 Redundancy Switch Revision 16
Ethernet Network Configurations MN/CRS300.IOM
3–2
3.3 Ethernet Configuration Examples
This section explains the problems with Ethernet Networking Loops, and how to properly design
applications architecture for handling Standard traffic and Split-path traffic. Standard traffic is
defined as Rx and Tx Ethernet traffic using the same port on the same router or switch, whereas
split-path traffic is Rx and Tx Ethernet traffic using different ports of the same router or switch.
Each application also has CRS-300 Redundancy applications examples, with subsequent sections in
this chapter providing examples of applications architecture designed to handle near-to-far end
Ethernet network configurations. This includes:
• Sect. 3.3.3 Hub-to-Hub with Standard Traffic using Switches
• Sect. 3.3.4 Hub-to-Hub with Standard Traffic using Routers
• Sect. 3.3.5 Hub-to-Remotes with Standard Traffic using Routers or Switches
• Sect. 3.3.6 Hub-to-Remotes, Split-path Traffic using Routers (Point-to-Multipoint)
• Sect. 3.3.7 Hub-to-Remotes, Split-path Traffic using Switches (Point-to-Multipoint)
3.3.1 Ethernet Network Overview
When placing modems in a network, there are a number of issues that must be addressed – first
and foremost on the list of concerns is whether implementation of the switches in the network
will cause a Networking Loop. This is problematic because a Networking Loop will cause a
Broadcast Storm, which shuts down the network and causes harm to devices in that network.
Figure 3-1. Networking Loop with Switches
Figure 3-1 illustra
tes a Networking Loop with switche
s. The problem with this configuration is that
‘Switch 1’ will send out an ARP request looking for a particular MAC, then each subsequent switch
passes along that request until ‘Switch 1’ receives it again. At this point, two things could happen:
1. The switch could continue to forward all requests out all ports, creating more and
more traffic on the network until there is no bandwidth available and the switch
either reboots or locks up.
2. The switch could sense that the ARP request came back to the switch on a different
port. The switch could then stop forwarding traffic out the proper port.
Other factors will affect the network: e.g., if the switch is running Spanning Tree Protocol,
VLANs, etc.
- CRS-300 1
- Table of Contents 5
- Figures 13
- PREFACE 17
- Preface MN/CRS300.IOM 18
- EN55024 - 1998 Compliance 19
- Safety Compliance 19
- EN 60950 19
- Low Voltage Directive (LVD) 19
- Warranty Policy 20
- Limitations of Warranty 20
- Exclusive Remedies 21
- Customer Support 22
- Online Customer Support 22
- Chapter 1. INTRODUCTION 23
- Introduction MN/CRS300.IOM 24
- 1.2 CRS-300 Compatibility 26
- 1.4.1 Front Panel 29
- 1.4.2 Rear Panel 30
- SLM-5650/5650A 33
- 1.6.5 Dimensional Envelopes 41
- Chapter 2. INSTALLATION 45
- Installation MN/CRS300.IOM 46
- Chapter 4 61
- CABLES AND CONNECTIONS 61
- 4.5.2 Carrier-in-Carrier 82
- (CnC) Data Connections 82
- Cable Connection Example 83
- Note 1 89
- Notes 2,3 89
- Emulation Mode 96
- MPORTANT 100
- Chapter 3. ETHERNET NETWORK 112
- CONFIGURATIONS 112
- Chapter 3. ETHERNET 127
- NETWORK CONFIGURATIONS 127
- IMPORTANT 133
- 4.11 IF Cable Connections 139
- 4.11 IF Cable Connections 140
- IMPOR TANT 145
- 5.2 Modem Configuration 146
- 5.2.1 Modem Power 146
- 5.2.2.1 Flash Updating 146
- Processor (NP) Interface 150
- Slot 1 Mod 152
- Slot 2 Demod 152
- Slot 3 Mod 152
- Slot 4 Demod 152
- Tables 5-2 throu 155
- Rev. F. and later versions; 158
- Rev. D and later versions 158
- CA and TA 161
- 5.5 Switch Configuration 162
- 5.5.1 Switch Power 162
- 5.5.2 Flash Updating 163
- 5.5.2.1.1 Flash Update Help 165
- 5.5.3.4 Set Holdoff Period 167
- 5.5.3.5 Set Alarm Masking 168
- User Clock/Data Interface: 174
- IDR ESC Interface connector 174
- TMI User Data Interface: 174
- ASI connectors 174
- Unbalanced G.703 connectors 176
- Quad E1 connectors 179
- Chapter 7. FRONT PANEL 181
- OPERATION 181
- 7.1.4 Opening Screen 185
- 7.2 CRS-300 Menu Structure 186
- 7.4.1 CONFIG: MANUAL 188
- 7.4.3 CONFIG: OPTIONS 189
- 7.4.4 CONFIG: REMOTE 191
- 7.5.1 INFO: S/N 193
- 7.5.2 INFO: ID 193
- 7.5.3 INFO: SETUP 193
- 7.5.4 INFO: IF-SWITCH 193
- 7.6 SELECT: MONITOR 194
- 7.6.1 MONITOR: STATUS 194
- 7.6.2 MONITOR: SW-ALARM 195
- 7.6.5 MONITOR: IO 198
- 7.7.1 STORE/LD: STORE 199
- 7.7.2 STORE/LD: LOAD 199
- 7.8 SELECT: UTILITY 200
- 7.8.3 UTILITY: SWITCH-ID 200
- 7.8.4 UTILITY: TEST 201
- 7.8.5 UTILITY: RELAY 201
- Appendix A. CABLE DRAWINGS 203
- A.3 Control Cables 207
- USED WITH CRS-300 Æ … 218
- Chp. 4 FIG USED FOR (TYPE) 218
- Chapter 4.7 230
- CDM-700 Modem Connections 230
- A.4.14 IF Cable, BNC 50Ω 232
- A.4.16 Multi-drop CnC 234
- Appendix B. ADDRESSING 239
- SCHEME INFORMATION 239
- B.2 Switch Addresses 240
- 1:1 internal 243
- Slave mode is available 243
- 1.6.2 or later 243
- B.3.1 Setting Up Modems 249
- B.4 M&C Applications 250
- Appendix C. REMOTE CONTROL 251
- C.3 EIA-232 252
- C.4 Basic Protocol 252
- C.5 Packet Structure 253
- C.5.1 Start of Packet 253
- C.5.2 Target Address 253
- C.5.3 Address Delimiter 254
- C.5.4 Instruction Code 254
- C.5.7 End of Packet 256
- 480 • 333 • 2200 PHONE 266
- • 333 • 2161 FAX 266
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